郭凯^1,2

1.内燃机可靠性国家重点实验室，山东 潍坊  261061；2.潍柴动力股份有限公司，山东 潍坊  261061

摘要：为降低某柴油机飞轮壳质量，将飞轮壳材料由铸铁更改为铸铝并进行结构优化。基于ABAQUS软件建立飞轮壳仿真模型，计算飞轮壳应力和疲劳寿命安全系数；根据仿真分析结果，对飞轮壳最大应力位置进行应力测试。结果表明：优化后，飞轮壳质量减轻11.69 kg；铸铝飞轮壳最大应力为219.7 MPa，静强度满足设计要求；最小高周疲劳安全系数为1.263，高周疲劳满足设计要求；最低使用寿命为78 600 h，预计最低寿命里程为300万km。本研究可以为飞轮壳及其他零部件的轻量化设计提供参考。

关键词：飞轮壳；静强度；高周疲劳；应力；优化设计

Abstract：In order to reduce the mass of flywheel housing of a diesel engine, the material of flywheel housing is changed from cast iron to cast aluminum, and its structure is optimized.Through calculating model of cast aluminum flywheel housing estimated by ABAQUS software, the largest stress and the fatigue life safety factor are obtained. According to the simulation results, the strain test is carried out for the maximum stress.The results show that the maximum stress point of cast aluminum flywheel shell is 219.7 MPa, the safety factor of minimum fatigue life is 1.263, the minimum service life of flywheel shell is 78 600 h, and the estimated minimum life mileage is more than 3 million km. The study can provide a reference for the optimal design of flywheel housing and other parts.

Keywords:flywheel housing; static strength; high cycle fatigue life; stress;optimization design